Is highly recommended to use Hiresfix or you will get bad results
Usage recommendations
You can choose Euler Ancestral, DPM++ 2M Karras, DPM++ 2M SDE Karras
for steps it's better at 20 - 40
CFG scale i think 6 - 8 is best
Resolution 512x768 (Portrait), 768x512 (Landscape)
for VAE you don't need to use it because it's already bakedvae
Prompt
Quality Prompt : masterpiece, best quality, incredibly absurdres, ultra detailed, ultra quality, 8K, photorealistic, sharp focus
Negative Prompt : (worst quality, low quality:1.4), interlocked fingers, bad anatomy, mutated hand
Of course you don't have to use all the prompts, just take what you need
This also works well with anime tags, so you can combine them
Hiresfix
use latent (nearest-exact) with Euler Ancestral
hires step you can set as before or 15 - 30
if you use latent (nearest-exact), denoise strength can't be below 0.5 because the image will be broken (if you force it maybe 0.35 is the limit)
use 4x-UltraSharp
if you use 30 sampling steps, the hires step will be 15 or 20
use 4x_NMKD-Superscale-SP_178000_G
use hires step 20 - 25
if you copy image preview please first checking hiresfix setting and seed
ADetailer
use face_yolov8s.pt default setting
if you feel the face doesn't match the style try reduce Detection model confidence threshold around 0.2 - 0.3, also you can reduce Inpaint denoising strength if using LoRa or specific face of the character
you can use ADetailer Prompt for example you want 2 different color eyes input "heterochromia, red eyes, blue eyes" or pupil shape, something like that
ADetailer Negative Prompt functions like a regular negative prompt. you can leave it blank
Note : ADetailer is only used if the person is at a distance or in full body. but it's okay if you want to use it up close
Those are all the settings that I used. You don't have to follow this guide. it's all up to you~